Transportable swaging press



1967 w. H. SCHWARTZ 3,354,694

TRANSPORTABLE SWAG ING PRES S Filed Aug. 31, 1964 3 Sheets-Sheet 1 FIG..1.

INVENTOR. WILLIAM H. SCHWARTZ BY m M )V ATTORNEYS 1967 w. H. SCHWARTZTRANSPORTABLE SWAGING PRESS Filed Aug. 51, 1964 5 Sheets-Sheet FIG. es

INVENTOR. WILLIAM H. SCIiWAR I Z M )ia-aw W AT TOW Nov. 28, 1967 w, H.SCHWARTZ 3,354,694

TRANSPORTABLE SWAGING PRES 5 Filed Aug. 31, 1964 3 Sheets-Sheet 3 4INVENTORQ WILLIAM H. SCHWARTZ Mu, M v 2 ATTORNEYS United States Patent3,354,694 TRANSPORTABLE SWAGING PRESS William H. Schwartz, 325 Summit,Corte Madera, Calif. 94925 Filed Aug. 31, 1964, Ser. No. 393,273 2Claims. (Cl. 72453) This invention relates to wire swaging presses, andmore particularly to a wire swaging press of such construction that itis easily transportable to job sites, is of relatively small dimensions,and requires little room to operate.

Wire swaging presses are used, i. a. to secure the ends of guy wires andsimilar cables, as in construction work, in the form of a loop.Typically, the end of the wire or cable is doubled back upon itself, athick metal clamp is slipped over the doubled portion, and the clamp isthen compressed in a swaging press until the metal of the clamp flowsbetween the strands of the guy wire or cable and pressure-welds theminto an inseparable unit.

In order to achieve this result, the swaging press must develop diepressures on the order of hundreds of tons. This obviously requires thatthe press be of massive construction and this, in turn, could previouslybe achieved only by providing bulky and awkward mechanisms which madetransportation of such presses to job sites and their operation in smallspaces very inconvenient.

The present invention provides a compact and effective arrangementthrough a novel location of the mechanism and the use of novel linkagemeans by which the hydraulically developed 'swaging pressure can betransmitted to the dies from a hydraulic mechanism located entirelywithin one of the jaws of the machine. This arrangement not onlyprovides compactness, but also protects the relatively delicatehydraulic mechanism from damage during transportation.

It is therefore the object of this invention to provide a swaging pressof compact dimensions and low weight, yet still capable of developingvery high die pressures.

It is another object of the invention to provide a transportable swagingpress in which the hydraulic member is contained entirely within one ofthe jaws of the machine.

These and other objects of the invention will become apparent from aperusal of the following specification taken in connection with theaccompanying drawings, in which:

FIG. 1 is a perspective view of the device of this invention;

FIG. 2 is a front view of the device of this invention;

FIG. 3 is a longitudinal vertical section along line 3-3 of FIG. 6;

FIG. 4 is a side elevation of the machine;

FIG. 5 is a rear view of the machine; and

FIG. 6 is a generally vertical section along line 66 of FIG. 4.

Basically, the invention teaches the construction of a transportableswaging press in the form of a pair of hinged jaws, one of whichconstitutes the frame and pedestal of the machine and the other themovable die carrying member, with the hydraulic mechanism containedwithin the confines of one of the jaws and its motion transmitted to theother by a linkage connecting the free ends of the jaws, the linearhorizontal motion of the hydraulic mechanism being translated to linearvertical motion of the linkage through the intermediary of a shaftcarrying a pair of angularly offset eccentric means.

Referring now to FIGS. 1 and 4, the machine in general is shown at 10.The machine 10 is composed basically of a pair of jaws 12, 14 of whichthe upper jaw or "ice arm 12 carries the upper die 16, and the lower jaw14 constitutes the stationary frame of the machine and carries the lowerdie member 18. Integrally formed with the frame 14 is the pedestal 29 ofthe machine consisting of front and rear feet 22 on each side of themachines center of gravity. The jaws 12, 14 are hinged at their rearends as at 24. The lower jaw or frame 14 contains a hydraulic cylinder26 to which hydraulic pressure can be supplied from any convenientexternal source of hydraulic fluid (not shown). The cylinder 26 containsa piston 28 attached to a piston rod 30 whose free end is hingedlysecured, as at 32, to an ear 34 of a torque arm. The rear end of thecylinder 26 is hingedly mounted on the frame 14 as at 38.

The torque arm 36 is afiixed against rotation to the squared faces 40 ofa shaft 42. The torque arm 36 is held in place on the shaft 42 by a yoke44. The shaft 42 is journaled in the frame 14 of the machine on rollerbearings 46, 48 and carries at its outward ends of a pair ofeccentrically disposed pins 50, 52. A pair of linkages 46, 56 arejournaled at one of their ends on the pins 50, 52, respectively, and areheld thereon by caps 58, 60. The other ends of the linkages 54, 56 arejournaled on the ends of a pivot shaft 62 which is fixedly held in theupper jaw or arm 12 of the machine by a set screw 64.

The front ends of the arm 12 and frame 14, respectively, carry diesupporting means 66, 68 which removably support the upper and lower dies16, 18. The device is preferably so designed that the opening of thejaws at the die ends is rather small, preferably on the order of no morethan two inches. In a typical embodiment, this requires a rotarymovement of the arm 12 about its hinge 24 of no more than 3.

In operation, a doubled-back end of wire, with its clamp afiixedthereto, is inserted between the dies 16, 18 when the jaws 12, 14 areopen. Hydraulic pressure is then applied to the cylinder 26, causing thepiston 28 and piston rod 30 to move frontward, ie, to the left in FIG.4. This motion imparts clockwise rotation in FIG. 4 to the shaft 42through the torque arm 36. The rotation of shaft 42, in turn, causes theeccentrically located pins 50, 52 to move downwardly so as to draw withthem the linkages 54, 56. This, in turn, causes arm 12 to rotatecounterclockwise about its hinge 24, so that the dies 16, 18 are drawntogether. Due to the considerable mechanical advantage obtained intranslating the rotary motion of the shaft 42 to the linear motion ofthe die 16, considerable pressures at the die may be produced withhydraulic means of relatively small size; for example, in a typicalembodiment, a 5'' ID, 3000 lb. thrust cylinder can develop a swagingforce of three hundred tons.

It will be seen that the present invention provides a simple andeffective, yet extremely compact, swaging press. As a result of itscompactness (the above-mentioned example occupies less than 10 cubicfeet of space), its over-all weight can also be kept to a minimum (lessthan 600 pounds in the above-mentioned example). Obviously, theinvention can be carried out in many different ways, of which theembodiment shown is merely illustrative. Therefore, I do not desire tobe limited by the embodiment shown and described, but rather only by thescope of the following claims.

What I claim and desire to secure by Letters Patent is:

1. A swaging press comprising: a pair of elongated jaw members hinged toone another at one of their ends and carrying die means at their otherends; linkage means connected to one of said jaw members generallyremote from its hinged end; rotatable eccentric means journaled in theother of said jaw members and eccentrically connected to said linkagemeans; and hydraulically extendable power means having one end pivotedto said other member adjacent the. hinged end of said other member, saidpower means including a piston and rod having an axis extendinggenerally parallel to a longitudinal axis of said other jaw member; saidpower means being eccentrically connected to said rotatable eccentricmeans.

2. A swaging press comprising: a pair of elongated jaw members hinged toone another at one of their ends and carrying die means at their otherends; linkage means connected to one of said jaw members generallyremote from its hinged end; rotatable eccentric means journaled in theother of said jaw members and eccentrically connected to said linkagemeans; and hydraulically extendable power means hinged to said other jawmember adjacent its hinged end and extending parallel to a longitudinalaxis of said other jaw member and generally within the confines of saidother jaw member; said power means including a piston and rod havingv anaxis substantially parallel to said other jaw member and beingeccentrically connected to said rotatable eccentric means.

References Cited UNITED STATES PATENTS LEONIDAS VLACHOS, PrimaryExaminer.

1. A SWAGING PRESS COMPRISING: A PAIR OF ELONGATED JAW MEMBERS HINGED TOONE ANOTHER AT ONE OF THEIR ENDS AND CARRYING DIE MEANS AT THEIR OTHERENDS; LINKAGE MEANS CONNECTED TO ONE OF SAID JAW MEMBERS GENERALLYREMOTE FROM ITS HINGED END; ROTATABLE ECCENTRIC MEANS JOURNALED IN THEOTHER OF SAID JAW MEMBERS AND ECCENTRICALLY CONNECTED TO SAID LINKAGEMEANS; AND HYDRAULICALLY EXTENDABLE POWER MEANS HAVING ONE END PIVOTEDTO SAID OTHER MEMBER ADJACENT THE HINGED END OF SAID OTHER MEMBER, SAIDPOWER MEANS INCLUDING A PISTON AND ROD HAVING AN AXIS EXTENDINGGENERALLY PARALLEL TO A LONGITUDINAL AXIS OF SAID OTHER JAW MEMBER; SAIDPOWER MEANS BEING ECCENTRICALLY CONNECTED TO SAID ROTATABLE ECCENTRICMEANS.